Hydration during exercise plays a critical role in performance by regulating body temperature, maintaining joint lubrication, and preventing fatigue. Adequate hydration ensures optimal blood flow, which is essential for delivering oxygen and nutrients to working muscles. Dehydration can lead to decreased performance, increased perceived effort, and higher risks of cramps or heat-related illnesses. It is vital for individuals to drink water or electrolyte-infused beverages before, during, and after workouts, as fluid balance directly influences endurance, strength, and overall athletic performance.